Droplet liquid applicator brush



FIG. 1 is a side view of the droplet liquid applicator brush, the opposite side, front, and rear views are identical;

FIG. 2 is an end view from the left of FIG. 1 on an enlarged scale; and,

FIG. 3 is a view from the end opposite to the end of FIG. 2 on an enlarged scale. 

The ornamental design of the droplet liquid applicator brush, as shown and described. 